Throgmorton House, Flat 3, 27 Elphinstone Road, Southsea, PO5 3HP

Throgmorton House is a one-bedroom end-of-terrace house in Southsea (PO5 3HP). It has a recorded floor area of 73 m² (around 786 sq ft) and construction records dating it to 1950-1966. The latest certificate (April 2023) shows a D (score 64), on the cusp of jumping into the C band. When first surveyed in May 2012 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor. The recommended improvements would push it to C (score 73). At 73 m² this is the 5th smallest of 7 units on EPC record in Throgmorton House, where floor areas span 33–122 m². The building's EPC ratings span D to C, with this unit at the bottom.

Untraded for 19 years, with the last transfer in September 2007. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 73 m² the property is well over the postcode median (54 m² across 39 EPCs), placing it in the larger end of the local stock. Across 2006–2007, sale prices on this property compounded at 9.2% per year. Today's modelled estimate of £166,000 is 40.1% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£151/sq ft) was about 15.6% below the postcode norm.